1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc1703d6a88d5261b5efa83f1ad130608c8698bcc9f8998610c868376421af89. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f524225e-9318-4851-82c0-b495ed745ceb.json and https://artists.proofprofile.net/proofs/artist/f524225e-9318-4851-82c0-b495ed745ceb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bdb600bf97e19c99782bb719a78d29b1beff67afbef44f81ba0dc51feafaa65. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM82436692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa5d9d4f0706a9a5c7ba4b1ed87c37fabddc80196b9024d2c8801355a2e5fa2. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM82436693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5bf9fab7a5e88558d9b24d57f2f0ae4172f493d2c038396ecd76a434fe701f0. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM82436695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e17459f5ee3ef56017d3053bf54211edd967b37da44e09294f18a4b62717494. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM82436697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaf5aebc250b0605e12474fd8f2c7a799ebc55ed6279a7ab5567b6b6391f5896. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM82436698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b7373bc969ddef8f0de0273408e0d11b7f328c5cf2d494dfc00e0c6a71f7cd3. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM82436700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ebc94d21dcb86b9e624a6c783b694d0dc1f0bccdcac834623a7b364ef3dd4ab. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM82436701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b1fac4b3ab639b1ce54a9a0f7c73af87312e16ba5f829ae36b11c2d8fa2282. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM82436702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe5cbadba90b0377ea39e4a0f35bac663c8f609a98c466cc02b9079fdd0344f7. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USL4R2455977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e6abad1593728715f48ca1080c7b70d071755cc6061502dadb5b6aefdb0452f. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USL4R2455987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x096fc84c5c2a497f27b05ba5f14dba81db12fa97967aeba6f76cb01680c3bf78. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USL4R2455988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfbeffb23d8e1c488f2f965dcc0b78e92d38027ea7caa9581c2ef24537d44e37. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USL4R2455989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c4b447887f2086fedc82b06f881d6fc42bfde1b143a73139b571c7b70fc888. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USL4R2455991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652483e37d58b79bea9cb1ff17a1d480070d054c9b613f1f4f4878438d37b8b9. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USL4R2455992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd389275b6d6792af3c1b2c81159850c099934bcf65558d6b1654e86813bec66e. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USL4R2455993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x358c15158dce5fe34649ae73d400caa7df15d4ff19275321d34cf2d402b94c4c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USX9P2403495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc57a2348b4d80050b32129fa914e24adde9a9d335ae5654538dfa68167edb8c0. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USX9P2403488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d9c80ad7f4bf1bcd004f7e5c756b2cdd4d23a7a0d36936c358532304b033ea1. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USX9P2403490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x579372877a6c98554257cb5399925af331704fa599989bccd386469f835ed6de. Chain 2 (Bitcoin): anchored in block 958602 (2026-07-18T19:28:16Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USX9P2403499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf964bf019334582d4785d471c3282fd82df6e2b68d8d827a450badfeee83bbdf. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USX9P2403492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fcc2ad97a04a0306dd80c40224882ca44427746b7700383b273c4ea45f267bc. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USX9P2403494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9bad3736e66426bc452dda2c1f27b77f5a29d8f73d8d534fe9b1e085c4de448. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USX9P2466980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x667dd90abc543c09d4cbc41d21ddb776315d4689238e7719f77af894e6bb58eb. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USX9P2466981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ace947f0d67ff5b00a68829f8b25e8489d275c54156cb71acc7cdc1c688d07c. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USX9P2466973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402715ee58e8027bb86b98810461016235e4fbb38c7148988ca2612e6a522164. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USX9P2466982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24f41de97e14232548c182506ddeda2baa6c4aef547c2b88b096cdc47345bca9. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USX9P2466975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbe420c62382f4c8c205f558706291558d4b9d222735b856e9be825ed2bcf4e6. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USX9P2466983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf489c337a8ac57fc102fac1000a24ae9264ca8259a2aeaf6177293e360e0841c. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USX9P2466978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b52515e7e8465be6f2076211be4189dc3e176f5721168c3f621e7663ee6a84. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USX9P2466979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8862ed9bc56b8cbb06853f3783b9cae5f2ab6aadeb86996e4d57fef26e7d1b48. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USY242435033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f4852152cf715315e98651be82c804b244dec34991e5f5f0f0739bed0bb112. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USY242435035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48197346f060efc68e2072ab76821a44483253b9b503b55d0eddf7935a8ae12e. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USY242435036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6783bc7669a7e8a070a24b5bfc5cb8244c2be84a4f25ed3c5bfd521612afafd. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USY242435037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6665928d7f90d45e6a797eb8b7fab694974fc3a40b3ffe4821867e51932565b. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USY242435039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe60c704d2b62b0bda42d9b9d8669715aa30dc131388c3175ab8ba6b74f3dfd16. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USY242435040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4240b3eba2c56f837920ddfa12b05cb144ea68f93f99ae3d3783fe5bf7a957c5. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USY242435041.